{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "10.6.0"
              },
              {
                "fixed": "18.7.6"
              },
              {
                "introduced": "10.6.0"
              },
              {
                "fixed": "18.7.6"
              },
              {
                "introduced": "18.8.0"
              },
              {
                "fixed": "18.8.6"
              },
              {
                "introduced": "18.8.0"
              },
              {
                "fixed": "18.8.6"
              },
              {
                "introduced": "18.9.0"
              },
              {
                "fixed": "18.9.2"
              },
              {
                "introduced": "18.9.0"
              },
              {
                "fixed": "18.9.2"
              }
            ]
          },
          "events": [
            {
              "introduced": "3d59f5643aa87ca1fc506bf1ad37262d8ca6b4d6"
            },
            {
              "fixed": "4ff507582a71b3fee0ef5a34e7ab583281391758"
            },
            {
              "introduced": "3d59f5643aa87ca1fc506bf1ad37262d8ca6b4d6"
            },
            {
              "fixed": "4ff507582a71b3fee0ef5a34e7ab583281391758"
            },
            {
              "introduced": "1010a9b2b769993080ce8399fd25e77c54e1ad1c"
            },
            {
              "fixed": "5831acc89ce4c662f751bb062d1df3bcf2b8cb4e"
            },
            {
              "introduced": "1010a9b2b769993080ce8399fd25e77c54e1ad1c"
            },
            {
              "fixed": "5831acc89ce4c662f751bb062d1df3bcf2b8cb4e"
            },
            {
              "introduced": "20fe49b575fedd2b8cadc2c0640178879854aeb3"
            },
            {
              "fixed": "fcb80522240b3ea1821ac6c2d52b00159bcda5a6"
            },
            {
              "introduced": "20fe49b575fedd2b8cadc2c0640178879854aeb3"
            },
            {
              "fixed": "fcb80522240b3ea1821ac6c2d52b00159bcda5a6"
            }
          ],
          "repo": "https://gitlab.com/gitlab-org/gitlab",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "GitLab",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1090.json"
  },
  "details": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user, when the `markdown_placeholders` feature flag was enabled, to inject JavaScript in a browser due to improper sanitization of placeholder content in markdown processing.",
  "id": "CVE-2026-1090",
  "modified": "2026-04-01T23:07:54.308020582Z",
  "published": "2026-03-11T16:05:05.863Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/586478"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1090.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1090"
    },
    {
      "type": "REPORT",
      "url": "https://hackerone.com/reports/3502450"
    },
    {
      "type": "PACKAGE",
      "url": "git://git@gitlab.com:gitlab-org/gitlab.git"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab"
}